Shell pasta with an extra tasty onion soup served in a mug topped with a light gratin, fresh parsley and crunchy breadcrumbs. French Onion Soup Pasta is a great way to revamp your onion soup leftovers! This is my first-ever mug meal! Actually, I went to buy the mugs extra for this recipe. A shell-formed pasta served with leftover onion soup and a gratin on top with a few breadcrumbs. In order to recall the “French onion soup bread”, plus it gives the meal an extra crunch. It’s quite simple to make and tasty, so if you have any onion soup leftovers at home, this French Onion Soup Pasta is the way to go! A Catalan Tradition as Inspiration French Onion Soup Pasta in a Mug The Shell Pasta The shell pasta is something you don’t get to see often on your plate. Where I live, in Barcelona, they call it “Galets” and…